Extracting email addresses culled from multiple messages

The whole Yahoo groups fiasco…. one of my groups has an owner that abandoned the group, after telling someone else to the transfer. They shut down the Yahoo group mid-transfer.

The new group is already running on Yahoo, but the transfer has been cancelled.

We both have group emails from various members.

I can bring up a list of every email I’ve saved from this group in Apple Mail - is there an easy way to pull the individual emails from it to make a group email list? (for some reason I think I was able to do this in Eudora).

Thanks for any ideas I can try!